128457670 has 32 divisors (see below), whose sum is σ = 265524480. Its totient is φ = 44252640.

The previous prime is 128457653. The next prime is 128457671. The reversal of 128457670 is 76754821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128457671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28642 + ... + 32821.

It is an arithmetic number, because the mean of its divisors is an integer number (8297640).

Almost surely, 2^128457670 is an apocalyptic number.

128457670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128457670 is an abundant number, since it is smaller than the sum of its proper divisors (137066810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128457670 is a wasteful number, since it uses less digits than its factorization.

128457670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61500.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 128457670 is about 11333.9167987064. The cubic root of 128457670 is about 504.5683597239.

The spelling of 128457670 in words is "one hundred twenty-eight million, four hundred fifty-seven thousand, six hundred seventy".